Meaning of "Bite his hand off"

[Ganesh]

Sasooo, what a beautiful avatar.
Ganesh

[Anahid]

hi there
it is a nice expression, first time to hear, thanks Alan to explain clearly

[Sasooo]

hi, kitosdad and Ganesh.
thanks about the avater. I like this avater too much. I am happy to be with all of you in this wonderful forum, hoping to be in touch with these good information .
regards,
sasoooo

[Samar Atique]

i m happy tostill with u.i want tolaern more

[Bui Manh Truong]

oh english is so interesting, in my mother language, we also have many idioms but i don't think it's so fantastic like that. thanks for your useful answer!